Free-floating Planet Mass Function from MOA-II 9 yr Survey toward the Galactic Bulge
The Astronomical Journal, 2023 We present the first measurement of the mass function of free-floating planets (FFPs), or very wide orbit planets down to an Earth mass, from the MOA-II microlensing survey in 2006–2014.
Takahiro Sumi +28 more
doaj +1 more source
Confirmation of Color-dependent Centroid Shift Measured After 1.8 Years with HST
The Astronomical Journal, 2023 We measured the precise masses of the host and planet in the OGLE-2003-BLG-235 system, when the lens and source were resolving, with 2018 Keck high resolution images.
Aparna Bhattacharya +12 more
doaj +1 more source
KMT-2022-BLG-2397: Brown Dwarf at the Upper Shore of the Einstein Desert
The Astronomical Journal, 2023 We measure the Einstein radius of the single-lens microlensing event KMT-2022-BLG-2397 to be θ _E = 24.8 ± 3.6 μ as, placing it at the upper shore of the Einstein Desert, 9 ≲ θ _E / μ as ≲ 25, between free-floating planets (FFPs) and bulge brown dwarfs ...
Andrew Gould +20 more
doaj +1 more source
Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function
The Astronomical JournalGravitational microlensing is a unique method for discovering cold planets across a broad mass range. Reliable statistics of the microlensing planets require accurate sensitivity estimates.
Yuxin Shang +7 more
doaj +1 more source
exoplanet-dev/exoplanet: exoplanet v0.5.0rc3
, 2021 0.5.0 (2021-05-04) Adds high-level, pure-Theano/Aesara implementation of RegularGridInterpolator to replace compiled version #167 Moves compiled Ops to exoplanet-core making exoplanet a pure-Python package #171 Moves ReboundOp and ReboundOrbit to ...
emilygilbert +10 more
core +1 more source
Two Low Mass-ratio Microlensing Planets and Two Types of Central-resonant Degeneracy
The Astronomical JournalWe present observations and analysis of two low planet/host mass-ratio ( q ) microlensing planets discovered in high-magnification events. KMT-2025-BLG-0811Lb has q ∼ 4.5 × 10 ^−5 , and a Bayesian analysis favors a super-Earth/mini-Neptune orbiting an M-
Yuchen Tang +45 more
doaj +1 more source
Systematic KMTNet Planetary Anomaly Search. XII. Complete Sample of 2017 Subprime Field Planets
The Astronomical JournalWe report the analysis of four unambiguous planets and one possible planet from the subprime fields (Γ ≤ 1 hr ^−1 ) of the 2017 Korea Microlensing Telescope Network (KMTNet) microlensing survey, to complete the KMTNet AnomalyFinder planetary sample for ...
Yuqian Gui +45 more
doaj +1 more source
OGLE-2016-BLG-1195 AO: Lens, Companion to Lens or Source, or None of the Above?
The Astronomical Journal, 2023 We systematically investigate Vandorou et al.’s claim to have detected the host star of the low-mass-ratio ( q < 10 ^−4 ) microlensing planet OGLE-2016-BLG-1195Lb, via Keck adaptive optics (AO) measurements Δ t = 4.12 yr after the event’s peak ( t _0 ...
Andrew Gould +6 more
doaj +1 more source
Detecting Exoplanets by Gravitational Microlensing using a Small Telescope
, 2006 8 pages, 4 figures, Society for Astronomical Science (May 2006)
openaire +2 more sources
Microlensing bias on the detection of strong lensing gravitational wave
, 2023 Identifying strong lensing gravitational wave (SLGW) events is of utmost importance in astrophysics as we approach the historic first detection of SLGW amidst the growing number of gravitational wave (GW) events.
Chen, Xuechun +3 more
core +1 more source